hence, why I said you should stick with CFL's.
Just from looking at your pics, I can tell already that your space is too small for a 400w bulb, unless you get the proper cooling setup, intake & out take fans blowing into a different room. You will have issues.
Try to get a lower bulb, maybe a 150w, 75w or use cfl's then switch to the HID when you flower
cfl's only require, typical k-mart fans, computer fans are nifty if your into DIY